Removable water-tube connection for stope drills



L. C. BAYLES REMOVABLE WATER TUBE CONNECTION FOR STOPE DRILLS Filed 112v. 29, 1921 Feb. 16 1926.

INV ENTO R lea.

HTS ATTOR EY E D Ill/4 N, 1L w l K /F L z w Patented Feb. 16, 1926.

UNITED STATES PATENT OFFICE.

LEXVI C. BAYLES, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND COM- PANY, F JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

REMOVABLE -WATER-TTJBE CONNECTION FOB STOPE DRILLS.

Application filed November 29, 1921,. Serial No. 518,550.

To all whom it may concern:

Be it known that I, LEWIS (l. Barnes, a citizen of the United States, and a resident of Easton, county of Northampton, and

State of Pennsylvania, have invented a certain Removable ater-Tube Connection for Stope Drills, of which the following is a specification accompanied by drawings.

This invention relates to fluid actuated rock drills of the hammer type, but more particularly to a conveniently removable water tube connection for stope drills. Heretofore the water tube of a stope drill could not be removed from the back end of the cylinder without first removing the feeding element, usually in the form of an air feed cylinder. The object of the present invention, is to enable the water tube to be inserted in or removed from the back end of the cylinder without disconnecting or interfering in any way with the feed cylinder. Such improved construction enables the water tube to be readily and conveniently inserted, or changed without removing :either the front head or air feed cylinder.

Further objects of the invention Wlll hereinafter appear and to all of these ends the invention consists of the devices described and claimed in the specification and shown in the accompanying drawings, in which Figure 1 is a longitudinal sectional elevation of a stope drill embodying the invention, only so much of the machine being shown as will serve to illustrate the invention.

Figure 2 is a side elevation of the machine with the water tube partially removed,

Figure 3 is a detail transverse sectional view of Figure 1 on the line 33 looking in the direction of the arrows, and

Figure l is a detail side elevation partly in longitudinal section of the front end of a stope drill showing a modification.

Referring to the drawings, the percussive element of the rock drill comprises the cylinder A, having the hammer piston B reciprocating therein, actuated by fluid pressure through suitable ports and passages, which are not shown as they form no part of the present invention. The cylinder is provided with the front cylinder washer C and front head I) through which the shank of the drill steel E extends in position to receive the blows of impact imparted by the hammer through the anvil block F.

A water conduit in the form of a water tube G extends through the head block H of the machine and through the hammer and anvil block into the hollow drill steel E, in order to conduct water to the drill hole, all of which is standard construction. A removable plug J having a lock nut J is threaded into the head block H and is adapted to receive a water connection K. The water tube G is preferably provided with a flange L adapted to be held in the reduced end of the plug J as by means of the packing O, which may be of rubber, and the gland P.

The feeding element which in accordance with the present invention forms a unit with the percussive element comprises the air feed cylinder 0, having the piston R and piston rod S, which extends through the back head T of the feed cylinder in slid-able, but non-rotatable engagement therewith, owing to the engagement of the groove U in the piston rod with the tongue V on the head T. A sleeve XV encircles the back end of the said feed cylinder Q and is adapted to be tightened by the bolt X which also engages the head T and holds it in position.

The longitudinal axis of the feeding element is in a plane off-set laterally from the plane of the longitudinal axis of the percussive element, so that the water tube G may be inserted in and removed from the back end of the percussive clement without removing the feeding element. In the form of machine shown in Figures 1 and 2, the feed cylinder Q is connected directly to the percussive element by connecting the upper end of the feed cylinder to one side of the head block H, and in order to locate the rock engaging pointer Y of the feeding element, on the line of the longitudinal axis of the percussive element, the piston rod S is bent at an angle as indicated in the figures. The point of support of the entire machine is then in line with the axis of the drilling.

Pressure fluid is supplied to the machine at the inlet Z at the rearward end of the percussive element controlled by the throttle valve on having a handle I) and passes to the percussive element through the port a. Pressure fluid passes to the feeding element ill) from the throttle valve through the passage (Z. The machine is provided with the usual rotation handle 6 conveniently connected to the head blocl; H.

In the modification of the invention shown in Figure 4, the feed cylinder Q is connected to the side of the cylinder A of the percussive element, at the forward end of the machine, instead of the rear end, and for this purpose the cylinder A may be provided With the projecting portion 7" at one side to which the feed cylinder Q is connected. The fluid pressure supply passage (Z for the feeding element in the modification shown in Figure 4, connects through the Wall of the cylinder A with the passage d in the head block H.

I claim:

1. In a fluid actuated stope drill of the hammer type the combination of a percussive element, a head block for the cylinder, a laterally oft-set fluid pressure feeding cylinder secured to the head block, a piston in said feeding cylinder, a rod for said piston held against rotation in the feed cylinder and having an off-set rock engaging pointer at one end for supporting the stope drill in the line of the longitudinal axis of the percussive cylinder, a centrally arranged Water tube through the percussive cylinder, and a plug for securing one end of the tube and adapted to receive a Water connection for supplying Water to said tube.

2. In a fluid actuated stope drill of the hammer type the combination of a percussive element, a head block for the cylinder, a later-ally off-set fluid pressure feeding cylinder secured to the head block, a piston in said feeding cylinder, a rod for said piston held against rotation in the feed cylinder and having an olt-set rock engaging pointer at one end for supporting the stope drill in the line of the longitudinal axis of the percussive cylinder, a throttle valve for admitting pressure fluid to the cylinders, a centrally arranged Water tube through the percussive cylinder, a plug screwed into the head block, one end of said plug being adapted to secure one end of the Water tube and the other end of said plug being adapted to receive a water connection for supplying Water to said tube.

In testimony whereof I have signed this specification.

LEWIS o. Barnes; 

